Non-pesticidal Management (NPM) describes various pest-control techniques which do not rely on pesticides.
It is used in organic production of foodstuff, as well as in other situations in which the introduction of toxins is undesirable.
Instead of the use of synthetic toxins, pest control is achieved by biological means.
Some examples of Non-Pesticidal Management techniques include: Over years insects have withstood natural calamities and survived successfully.
They are able to develop resistance to chemical pesticides insecticides used by farmers.